<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package        CodeIgniter
 * @author        ExpressionEngine Dev Team
 * @copyright    Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license        http://codeigniter.com/user_guide/license.html
 * @link        http://codeigniter.com
 * @since        Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * CodeIgniter Download Helpers
 *
 * @package        CodeIgniter
 * @subpackage    Helpers
 * @category    Helpers
 * @author        ExpressionEngine Dev Team
 * @link        http://codeigniter.com/user_guide/helpers/download_helper.html
 */

// ------------------------------------------------------------------------

/**
 * Force Download
 *
 * Generates headers that force a download to happen
 *
 * @access    public
 * @param    string    filename
 * @param    mixed    the data to be downloaded
 * @return    void
 */
if (!function_exists('force_download')) {
    function force_download($filename = '', $data = '')
    {
        if ($filename == '' OR $data == '') {
            return FALSE;
        }

        // Try to determine if the filename includes a file extension.
        // We need it in order to set the MIME type
        if (FALSE === strpos($filename, '.')) {
            return FALSE;
        }

        // Grab the file extension
        $x = explode('.', $filename);
        $extension = end($x);

        // Load the mime types
        if (defined('ENVIRONMENT') AND is_file(APPPATH . 'config/' . ENVIRONMENT . '/mimes.php')) {
            include(APPPATH . 'config/' . ENVIRONMENT . '/mimes.php');
        } elseif (is_file(APPPATH . 'config/mimes.php')) {
            include(APPPATH . 'config/mimes.php');
        }

        // Set a default mime if we can't find it
        if (!isset($mimes[$extension])) {
            $mime = 'application/octet-stream';
        } else {
            $mime = (is_array($mimes[$extension])) ? $mimes[$extension][0] : $mimes[$extension];
        }

        // Generate the server headers
        if (strpos($_SERVER['HTTP_USER_AGENT'], "MSIE") !== FALSE) {
            header('Content-Type: "' . $mime . '"');
            header('Content-Disposition: attachment; filename="' . $filename . '"');
            header('Expires: 0');
            header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
            header("Content-Transfer-Encoding: binary");
            header('Pragma: public');
            header("Content-Length: " . strlen($data));
        } else {
            header('Content-Type: "' . $mime . '"');
            header('Content-Disposition: attachment; filename="' . $filename . '"');
            header("Content-Transfer-Encoding: binary");
            header('Expires: 0');
            header('Pragma: no-cache');
            header("Content-Length: " . strlen($data));
        }

        exit($data);
    }
}


/* End of file download_helper.php */
/* Location: ./system/helpers/download_helper.php */